I am honestly kinda curious how exactly you manage your servers and keep them up to date, I feel like there is a linux patch every week or so, which would usually require a reboot. Do you all deploy live patching, how you become aware of critical stuff in your otherwise busy lives, RSS?
I think OP is asking about system updates. Zero time application deployment is a different thing.
You’re swapping in entire new servers, servers with the system updates applied.